Download Citation on ResearchGate | On Jan 1, , ASTM and others published D standard test method for unconfined compressive strength of. definitions of terms. 1 This test method is under the jurisdiction of ASTM Committee D18 on Soil and Last previous edition approved in as D – 00e1. Page 1. ASTM D Unconfined Compressive Strength. Page 2. Page 3.
|Published (Last):||1 August 2006|
|PDF File Size:||2.15 Mb|
|ePub File Size:||6.17 Mb|
|Price:||Free* [*Free Regsitration Required]|
Soil compaction produces an increase in resistance and decreased deformability. Application of Compaction Energies The compacting procedure for the stabilized soil was compaction by layers with a weight falling from a controlled height Proctor compaction procedure. Earth is a cheap, ecological, and plenty material for construction.
Unconfined Compression Test ASTM D-2166 /02
Figure 2 shows that the increase in density causes increases in resistance. Mohr Circle for stress In 2D space e. To make this website work, we log user data and share it with processors. My presentations Profile Feedback Log out. Specimen trimmer if undisturbed sample is tested.
ASTM D – 00 Standard Test Method for Unconfined Compressive Strength of Cohesive Soil
Then, following the ASTM standard [ 19 ], the liquid and plastic limits were determined, as well as the shrinkage limit [ 20 ]. In this respect, there have been efforts for producing these bricks with fly ashes wstm a small percentage of CaOH. The compaction energy was selected to be the best reasonable strength.
With this procedure, sustainable bricks of high and homogeneous resistance can be obtained. The liquid limit was Plasticity limits versus percentages f2166 CaOH are shown in Figure 1. The applications of the use of soils treated with CaOH e2166, for example, in the construction of bed-layers of pavements, in the stabilization of dams made of earth, and as a layer for supporting shallow foundations [ 3 ].
This was done to define the best behavior and strength.
For stabilization of expansive clay, three different doses of CaOH, namely, 6, 8, and 10 percent of its dry weight, were aggregated to each sample. Dial gage for measuring axial deformation. Rupture stress and fracture stress of the proposed brick and some commercial products.
Dry and crumbly soils, fissured or varved materials, silts, peats, and sands cannot be tested with this method to obtain valid unconfined compression strength values. Stabilized-soils tests specimens were prepared and subjected to unconfined compression, following the ASTM D standard [ 25 ].
From Table 2it can be observed that the best results for the proposed brick under study were obtained at 60 days. Then, they were compacted with a specific energy for obtaining an optimal and maximum controlled density to ensure an r2166 in strength.
With this data and the plasticity index, the activity index of the clay was determined as 4. Moreover, because of its production environmental problems emerge such as a high-energy consumption as well as high emissions of carbon dioxide [ 9 ], thus causing damage to the public health [ 10 ]. Then with the objective of identifying the nearest energy value, the following tests were performed between values of Proctor standard d2616 Proctor modified energies.
These pieces are preferred because of their cultural awtm, accessibility, and long history. The constant growing of human settlements has provoked the urban astmm to be extended up to agricultural lands, thus forcing to build on top of them. These were compared with commercial pieces for masonry, tested under the same norm.
Unconfined Compressive Strength Test specimens of modified soils were subjected to unconfined compression [ 25 ] at different ages 7, 14, 30, and 60 days and the compaction energies mentioned above.
The aim was to find the optimal CaOH quantity for abating volumetric changes. Since fifty years ago, the introduction of blocks made of compressed earth was seen as an important step. We think you aetm liked this presentation.
There was a problem providing the content you requested
Indeed they have been used since years ago in Egypt and they represent the first materials manufactured for buildings [ 8 ]. We conclude that in wstm soils treated with lime two 0 compaction energies can be considered with respect to the variation of a determined optimum moisture: Therefore two optimal compaction energies can be considered with respect to the variation of optimum moisture, the first when the optimal humidity reaches its smallest value and the second when it increases, after reaching its d216 value.
This probably occurs due to the continuous increase in compaction energy that causes the soil particles and humidity to achieve their best accommodation: Note The determination of the unconsolidated, undrained strength of cohesive soils with lateral confinement is covered by Test Method D Stabilization of Soil with CaOH For stabilization of expansive clay, three different doses of CaOH, namely, 6, 8, and 10 percent of its dry weight, were aggregated to each sample.
The s2166 of this study is to use this trash expansive soil via a composite material, soil-CaOH, to produce bricks of optimal and controlled compaction energy for masonry, which is neglected in the production of this kind d21666 bricks. Background The applications of the use of soils treated with CaOH are, for example, in 000 construction of bed-layers of pavements, in the stabilization of dams made of earth, and as a layer for supporting shallow foundations [ 3 ].
This procedure is supposed to increase soil density. To achieve this, the trash expansive soil was stabilized with CaOH to eliminate its volumetric changes and then it was compacted at different energies per volume cubic meter for controlling different densities and to obtain an optimal-controlled density and optimum moisture to assure a larger strength in the material.
The rate of humidity absorption depends greatly on cement content. It seems that the latter modified the porosity and apparent density of d266 bricks and improved their behavior under water action and their compressive strength too.